The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A way of getting a good idea when to plant eggplants is to refer to the USDA zone info for Douglas.

Planting Calendar for Eggplants

Frost tolerance for eggplants:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

It's not a good idea to plant eggplants until after the last frost because they require warm weather.

The earliest that you can plant eggplants in Douglas is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant eggplants and expect a good harvest is probably August. Any later than that and your eggplants may not have a chance to really do well. If you are starting your eggplants indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average all chance of frost has passed is on May 15 in Douglas. You should expect an average low temperature of -25°F in the coldest months of winter.

Remember that USDA zone info for Douglas is an average and the actual date of last frost is different every year. Half of the time in Douglas there is a last frost after May 15 so make sure that you are ready to protect your eggplants if you have one of those late frosts.

USDA Zone Info for Douglas

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Douglas

You may be interested in your other planting guides for Douglas.